Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/raw_ip6.c
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1 /* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: releng/5.1/sys/netinet6/raw_ip6.c 111145 2003-02-19 22:32:43Z jlemon $ 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1988, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 65 */ 66 67 #include "opt_ipsec.h" 68 #include "opt_inet6.h" 69 70 #include <sys/param.h> 71 #include <sys/errno.h> 72 #include <sys/lock.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/proc.h> 76 #include <sys/protosw.h> 77 #include <sys/signalvar.h> 78 #include <sys/socket.h> 79 #include <sys/socketvar.h> 80 #include <sys/sx.h> 81 #include <sys/systm.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/route.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/icmp6.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/ip6.h> 93 #include <netinet6/ip6protosw.h> 94 #include <netinet6/ip6_mroute.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/ip6_var.h> 97 #include <netinet6/nd6.h> 98 #include <netinet6/raw_ip6.h> 99 #ifdef ENABLE_DEFAULT_SCOPE 100 #include <netinet6/scope6_var.h> 101 #endif 102 103 #ifdef IPSEC 104 #include <netinet6/ipsec.h> 105 #include <netinet6/ipsec6.h> 106 #endif /*IPSEC*/ 107 108 #ifdef FAST_IPSEC 109 #include <netipsec/ipsec.h> 110 #include <netipsec/ipsec6.h> 111 #endif /* FAST_IPSEC */ 112 113 #include <machine/stdarg.h> 114 115 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 116 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 117 118 /* 119 * Raw interface to IP6 protocol. 120 */ 121 122 extern struct inpcbhead ripcb; 123 extern struct inpcbinfo ripcbinfo; 124 extern u_long rip_sendspace; 125 extern u_long rip_recvspace; 126 127 struct rip6stat rip6stat; 128 129 /* 130 * Setup generic address and protocol structures 131 * for raw_input routine, then pass them along with 132 * mbuf chain. 133 */ 134 int 135 rip6_input(mp, offp, proto) 136 struct mbuf **mp; 137 int *offp, proto; 138 { 139 struct mbuf *m = *mp; 140 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 141 register struct inpcb *in6p; 142 struct inpcb *last = 0; 143 struct mbuf *opts = NULL; 144 struct sockaddr_in6 rip6src; 145 146 rip6stat.rip6s_ipackets++; 147 148 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 149 /* XXX send icmp6 host/port unreach? */ 150 m_freem(m); 151 return IPPROTO_DONE; 152 } 153 154 init_sin6(&rip6src, m); /* general init */ 155 156 LIST_FOREACH(in6p, &ripcb, inp_list) { 157 if ((in6p->in6p_vflag & INP_IPV6) == 0) 158 continue; 159 if (in6p->in6p_ip6_nxt && 160 in6p->in6p_ip6_nxt != proto) 161 continue; 162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 164 continue; 165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 167 continue; 168 if (in6p->in6p_cksum != -1) { 169 rip6stat.rip6s_isum++; 170 if (in6_cksum(m, ip6->ip6_nxt, *offp, 171 m->m_pkthdr.len - *offp)) { 172 rip6stat.rip6s_badsum++; 173 continue; 174 } 175 } 176 if (last) { 177 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 178 179 #ifdef IPSEC 180 /* 181 * Check AH/ESP integrity. 182 */ 183 if (n && ipsec6_in_reject(n, last)) { 184 m_freem(n); 185 ipsec6stat.in_polvio++; 186 /* do not inject data into pcb */ 187 } else 188 #endif /*IPSEC*/ 189 #ifdef FAST_IPSEC 190 /* 191 * Check AH/ESP integrity. 192 */ 193 if (n && ipsec6_in_reject(n, last)) { 194 m_freem(n); 195 /* do not inject data into pcb */ 196 } else 197 #endif /*FAST_IPSEC*/ 198 if (n) { 199 if (last->in6p_flags & IN6P_CONTROLOPTS || 200 last->in6p_socket->so_options & SO_TIMESTAMP) 201 ip6_savecontrol(last, &opts, ip6, n); 202 /* strip intermediate headers */ 203 m_adj(n, *offp); 204 if (sbappendaddr(&last->in6p_socket->so_rcv, 205 (struct sockaddr *)&rip6src, 206 n, opts) == 0) { 207 m_freem(n); 208 if (opts) 209 m_freem(opts); 210 rip6stat.rip6s_fullsock++; 211 } else 212 sorwakeup(last->in6p_socket); 213 opts = NULL; 214 } 215 } 216 last = in6p; 217 } 218 #ifdef IPSEC 219 /* 220 * Check AH/ESP integrity. 221 */ 222 if (last && ipsec6_in_reject(m, last)) { 223 m_freem(m); 224 ipsec6stat.in_polvio++; 225 ip6stat.ip6s_delivered--; 226 /* do not inject data into pcb */ 227 } else 228 #endif /*IPSEC*/ 229 #ifdef FAST_IPSEC 230 /* 231 * Check AH/ESP integrity. 232 */ 233 if (last && ipsec6_in_reject(m, last)) { 234 m_freem(m); 235 ip6stat.ip6s_delivered--; 236 /* do not inject data into pcb */ 237 } else 238 #endif /*FAST_IPSEC*/ 239 if (last) { 240 if (last->in6p_flags & IN6P_CONTROLOPTS || 241 last->in6p_socket->so_options & SO_TIMESTAMP) 242 ip6_savecontrol(last, &opts, ip6, m); 243 /* strip intermediate headers */ 244 m_adj(m, *offp); 245 if (sbappendaddr(&last->in6p_socket->so_rcv, 246 (struct sockaddr *)&rip6src, m, opts) == 0) { 247 m_freem(m); 248 if (opts) 249 m_freem(opts); 250 rip6stat.rip6s_fullsock++; 251 } else 252 sorwakeup(last->in6p_socket); 253 } else { 254 rip6stat.rip6s_nosock++; 255 if (m->m_flags & M_MCAST) 256 rip6stat.rip6s_nosockmcast++; 257 if (proto == IPPROTO_NONE) 258 m_freem(m); 259 else { 260 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 261 icmp6_error(m, ICMP6_PARAM_PROB, 262 ICMP6_PARAMPROB_NEXTHEADER, 263 prvnxtp - mtod(m, char *)); 264 } 265 ip6stat.ip6s_delivered--; 266 } 267 return IPPROTO_DONE; 268 } 269 270 void 271 rip6_ctlinput(cmd, sa, d) 272 int cmd; 273 struct sockaddr *sa; 274 void *d; 275 { 276 struct ip6_hdr *ip6; 277 struct mbuf *m; 278 int off = 0; 279 struct ip6ctlparam *ip6cp = NULL; 280 const struct sockaddr_in6 *sa6_src = NULL; 281 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 282 283 if (sa->sa_family != AF_INET6 || 284 sa->sa_len != sizeof(struct sockaddr_in6)) 285 return; 286 287 if ((unsigned)cmd >= PRC_NCMDS) 288 return; 289 if (PRC_IS_REDIRECT(cmd)) 290 notify = in6_rtchange, d = NULL; 291 else if (cmd == PRC_HOSTDEAD) 292 d = NULL; 293 else if (inet6ctlerrmap[cmd] == 0) 294 return; 295 296 /* if the parameter is from icmp6, decode it. */ 297 if (d != NULL) { 298 ip6cp = (struct ip6ctlparam *)d; 299 m = ip6cp->ip6c_m; 300 ip6 = ip6cp->ip6c_ip6; 301 off = ip6cp->ip6c_off; 302 sa6_src = ip6cp->ip6c_src; 303 } else { 304 m = NULL; 305 ip6 = NULL; 306 sa6_src = &sa6_any; 307 } 308 309 (void) in6_pcbnotify(&ripcb, sa, 0, (const struct sockaddr *)sa6_src, 310 0, cmd, notify); 311 } 312 313 /* 314 * Generate IPv6 header and pass packet to ip6_output. 315 * Tack on options user may have setup with control call. 316 */ 317 int 318 #if __STDC__ 319 rip6_output(struct mbuf *m, ...) 320 #else 321 rip6_output(m, va_alist) 322 struct mbuf *m; 323 va_dcl 324 #endif 325 { 326 struct socket *so; 327 struct sockaddr_in6 *dstsock; 328 struct mbuf *control; 329 struct in6_addr *dst; 330 struct ip6_hdr *ip6; 331 struct inpcb *in6p; 332 u_int plen = m->m_pkthdr.len; 333 int error = 0; 334 struct ip6_pktopts opt, *optp = 0; 335 struct ifnet *oifp = NULL; 336 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 337 int priv = 0; 338 va_list ap; 339 340 va_start(ap, m); 341 so = va_arg(ap, struct socket *); 342 dstsock = va_arg(ap, struct sockaddr_in6 *); 343 control = va_arg(ap, struct mbuf *); 344 va_end(ap); 345 346 in6p = sotoin6pcb(so); 347 348 priv = 0; 349 if (so->so_cred->cr_uid == 0) 350 priv = 1; 351 dst = &dstsock->sin6_addr; 352 if (control) { 353 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 354 goto bad; 355 optp = &opt; 356 } else 357 optp = in6p->in6p_outputopts; 358 359 /* 360 * For an ICMPv6 packet, we should know its type and code 361 * to update statistics. 362 */ 363 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 364 struct icmp6_hdr *icmp6; 365 if (m->m_len < sizeof(struct icmp6_hdr) && 366 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 367 error = ENOBUFS; 368 goto bad; 369 } 370 icmp6 = mtod(m, struct icmp6_hdr *); 371 type = icmp6->icmp6_type; 372 code = icmp6->icmp6_code; 373 } 374 375 M_PREPEND(m, sizeof(*ip6), M_TRYWAIT); 376 ip6 = mtod(m, struct ip6_hdr *); 377 378 /* 379 * Next header might not be ICMP6 but use its pseudo header anyway. 380 */ 381 ip6->ip6_dst = *dst; 382 383 /* 384 * If the scope of the destination is link-local, embed the interface 385 * index in the address. 386 * 387 * XXX advanced-api value overrides sin6_scope_id 388 */ 389 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 390 struct in6_pktinfo *pi; 391 392 /* 393 * XXX Boundary check is assumed to be already done in 394 * ip6_setpktoptions(). 395 */ 396 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 397 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 398 oifp = ifnet_byindex(pi->ipi6_ifindex); 399 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 400 in6p->in6p_moptions && 401 in6p->in6p_moptions->im6o_multicast_ifp) { 402 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 403 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 404 } else if (dstsock->sin6_scope_id) { 405 /* boundary check */ 406 if (dstsock->sin6_scope_id < 0 407 || if_index < dstsock->sin6_scope_id) { 408 error = ENXIO; /* XXX EINVAL? */ 409 goto bad; 410 } 411 ip6->ip6_dst.s6_addr16[1] 412 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 413 } 414 } 415 416 /* 417 * Source address selection. 418 */ 419 { 420 struct in6_addr *in6a; 421 422 if ((in6a = in6_selectsrc(dstsock, optp, 423 in6p->in6p_moptions, 424 &in6p->in6p_route, 425 &in6p->in6p_laddr, 426 &error)) == 0) { 427 if (error == 0) 428 error = EADDRNOTAVAIL; 429 goto bad; 430 } 431 ip6->ip6_src = *in6a; 432 if (in6p->in6p_route.ro_rt) 433 oifp = ifnet_byindex(in6p->in6p_route.ro_rt->rt_ifp->if_index); 434 } 435 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 436 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 437 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 438 (IPV6_VERSION & IPV6_VERSION_MASK); 439 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 440 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 441 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 442 443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 444 in6p->in6p_cksum != -1) { 445 struct mbuf *n; 446 int off; 447 u_int16_t *p; 448 449 /* compute checksum */ 450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 451 off = offsetof(struct icmp6_hdr, icmp6_cksum); 452 else 453 off = in6p->in6p_cksum; 454 if (plen < off + 1) { 455 error = EINVAL; 456 goto bad; 457 } 458 off += sizeof(struct ip6_hdr); 459 460 n = m; 461 while (n && n->m_len <= off) { 462 off -= n->m_len; 463 n = n->m_next; 464 } 465 if (!n) 466 goto bad; 467 p = (u_int16_t *)(mtod(n, caddr_t) + off); 468 *p = 0; 469 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 470 } 471 472 error = ip6_output(m, optp, &in6p->in6p_route, 0, 473 in6p->in6p_moptions, &oifp, in6p); 474 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 475 if (oifp) 476 icmp6_ifoutstat_inc(oifp, type, code); 477 icmp6stat.icp6s_outhist[type]++; 478 } else 479 rip6stat.rip6s_opackets++; 480 481 goto freectl; 482 483 bad: 484 if (m) 485 m_freem(m); 486 487 freectl: 488 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 489 RTFREE(optp->ip6po_route.ro_rt); 490 if (control) { 491 if (optp == &opt) 492 ip6_clearpktopts(optp, 0, -1); 493 m_freem(control); 494 } 495 return(error); 496 } 497 498 /* 499 * Raw IPv6 socket option processing. 500 */ 501 int 502 rip6_ctloutput(so, sopt) 503 struct socket *so; 504 struct sockopt *sopt; 505 { 506 int error; 507 508 if (sopt->sopt_level == IPPROTO_ICMPV6) 509 /* 510 * XXX: is it better to call icmp6_ctloutput() directly 511 * from protosw? 512 */ 513 return(icmp6_ctloutput(so, sopt)); 514 else if (sopt->sopt_level != IPPROTO_IPV6) 515 return (EINVAL); 516 517 error = 0; 518 519 switch (sopt->sopt_dir) { 520 case SOPT_GET: 521 switch (sopt->sopt_name) { 522 case MRT6_INIT: 523 case MRT6_DONE: 524 case MRT6_ADD_MIF: 525 case MRT6_DEL_MIF: 526 case MRT6_ADD_MFC: 527 case MRT6_DEL_MFC: 528 case MRT6_PIM: 529 error = ip6_mrouter_get(so, sopt); 530 break; 531 default: 532 error = ip6_ctloutput(so, sopt); 533 break; 534 } 535 break; 536 537 case SOPT_SET: 538 switch (sopt->sopt_name) { 539 case MRT6_INIT: 540 case MRT6_DONE: 541 case MRT6_ADD_MIF: 542 case MRT6_DEL_MIF: 543 case MRT6_ADD_MFC: 544 case MRT6_DEL_MFC: 545 case MRT6_PIM: 546 error = ip6_mrouter_set(so, sopt); 547 break; 548 default: 549 error = ip6_ctloutput(so, sopt); 550 break; 551 } 552 break; 553 } 554 555 return (error); 556 } 557 558 static int 559 rip6_attach(struct socket *so, int proto, struct thread *td) 560 { 561 struct inpcb *inp; 562 int error, s; 563 564 inp = sotoinpcb(so); 565 if (inp) 566 panic("rip6_attach"); 567 if (td && (error = suser(td)) != 0) 568 return error; 569 570 error = soreserve(so, rip_sendspace, rip_recvspace); 571 if (error) 572 return error; 573 s = splnet(); 574 error = in_pcballoc(so, &ripcbinfo, td); 575 splx(s); 576 if (error) 577 return error; 578 inp = (struct inpcb *)so->so_pcb; 579 inp->inp_vflag |= INP_IPV6; 580 inp->in6p_ip6_nxt = (long)proto; 581 inp->in6p_hops = -1; /* use kernel default */ 582 inp->in6p_cksum = -1; 583 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 584 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 585 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 586 return 0; 587 } 588 589 static int 590 rip6_detach(struct socket *so) 591 { 592 struct inpcb *inp; 593 594 inp = sotoinpcb(so); 595 if (inp == 0) 596 panic("rip6_detach"); 597 /* xxx: RSVP */ 598 if (so == ip6_mrouter) 599 ip6_mrouter_done(); 600 if (inp->in6p_icmp6filt) { 601 FREE(inp->in6p_icmp6filt, M_PCB); 602 inp->in6p_icmp6filt = NULL; 603 } 604 in6_pcbdetach(inp); 605 return 0; 606 } 607 608 static int 609 rip6_abort(struct socket *so) 610 { 611 soisdisconnected(so); 612 return rip6_detach(so); 613 } 614 615 static int 616 rip6_disconnect(struct socket *so) 617 { 618 struct inpcb *inp = sotoinpcb(so); 619 620 if ((so->so_state & SS_ISCONNECTED) == 0) 621 return ENOTCONN; 622 inp->in6p_faddr = in6addr_any; 623 return rip6_abort(so); 624 } 625 626 static int 627 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 628 { 629 struct inpcb *inp = sotoinpcb(so); 630 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 631 struct ifaddr *ia = NULL; 632 633 if (nam->sa_len != sizeof(*addr)) 634 return EINVAL; 635 636 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 637 return EADDRNOTAVAIL; 638 #ifdef ENABLE_DEFAULT_SCOPE 639 if (addr->sin6_scope_id == 0) { /* not change if specified */ 640 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 641 } 642 #endif 643 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 644 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 645 return EADDRNOTAVAIL; 646 if (ia && 647 ((struct in6_ifaddr *)ia)->ia6_flags & 648 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 649 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 650 return(EADDRNOTAVAIL); 651 } 652 inp->in6p_laddr = addr->sin6_addr; 653 return 0; 654 } 655 656 static int 657 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 658 { 659 struct inpcb *inp = sotoinpcb(so); 660 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 661 struct in6_addr *in6a = NULL; 662 int error = 0; 663 #ifdef ENABLE_DEFAULT_SCOPE 664 struct sockaddr_in6 tmp; 665 #endif 666 667 if (nam->sa_len != sizeof(*addr)) 668 return EINVAL; 669 if (TAILQ_EMPTY(&ifnet)) 670 return EADDRNOTAVAIL; 671 if (addr->sin6_family != AF_INET6) 672 return EAFNOSUPPORT; 673 #ifdef ENABLE_DEFAULT_SCOPE 674 if (addr->sin6_scope_id == 0) { /* not change if specified */ 675 /* avoid overwrites */ 676 tmp = *addr; 677 addr = &tmp; 678 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 679 } 680 #endif 681 /* Source address selection. XXX: need pcblookup? */ 682 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 683 inp->in6p_moptions, &inp->in6p_route, 684 &inp->in6p_laddr, &error); 685 if (in6a == NULL) 686 return (error ? error : EADDRNOTAVAIL); 687 inp->in6p_laddr = *in6a; 688 inp->in6p_faddr = addr->sin6_addr; 689 soisconnected(so); 690 return 0; 691 } 692 693 static int 694 rip6_shutdown(struct socket *so) 695 { 696 socantsendmore(so); 697 return 0; 698 } 699 700 static int 701 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 702 struct mbuf *control, struct thread *td) 703 { 704 struct inpcb *inp = sotoinpcb(so); 705 struct sockaddr_in6 tmp; 706 struct sockaddr_in6 *dst; 707 708 /* always copy sockaddr to avoid overwrites */ 709 if (so->so_state & SS_ISCONNECTED) { 710 if (nam) { 711 m_freem(m); 712 return EISCONN; 713 } 714 /* XXX */ 715 bzero(&tmp, sizeof(tmp)); 716 tmp.sin6_family = AF_INET6; 717 tmp.sin6_len = sizeof(struct sockaddr_in6); 718 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 719 sizeof(struct in6_addr)); 720 dst = &tmp; 721 } else { 722 if (nam == NULL) { 723 m_freem(m); 724 return ENOTCONN; 725 } 726 tmp = *(struct sockaddr_in6 *)nam; 727 dst = &tmp; 728 } 729 #ifdef ENABLE_DEFAULT_SCOPE 730 if (dst->sin6_scope_id == 0) { /* not change if specified */ 731 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 732 } 733 #endif 734 return rip6_output(m, so, dst, control); 735 } 736 737 struct pr_usrreqs rip6_usrreqs = { 738 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 739 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 740 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 741 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 742 in6_setsockaddr, sosend, soreceive, sopoll 743 };
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